EDIT

The subAreaPreference rule for filtering Distributions is implemented in the DescriptionUtility.filterDistributions()

Sub area preference rule¶

The rule as currently implemented:

"If there is an area with a direct sub area and both areas have the same computed status only the information on the sub area should be reported, whereas the super area should be ignored."

This rule has a restriction which is no longer valid:

"NOTE: this rule only applies to non computed areas, since the second rule is applied first!. TODO this is no longer valid since the second rule has been removed_" the so called second rule was: "In computed distributions, distributions in sub areas are preferred over those for parent areas if they have the same status"

Questions and Facts¶

• The subAreaPreference rule must only affect the maps and never must remove any Area from textual distribution information. It is originally only implemented in attachment:"#3904:FillHelsinkiOccurrence.bas" which had sole purpose of preparing the table to be sent to Helsinki for creating the maps. TODO: make subAreaPreference rule independent from other filters and execute it exclusively for maps. DONE [r24597|r24598]

• The subAreaPreference rule must be applied to all Distributions, to computed and edited. This can bee clearly seen in attachment:"#3904:FillHelsinkiOccurrence.bas" - UPDATE: the subAreaPreference was never limited to only computed Distributions, this was only confused in the documentation and comments. TODO: disentangle documentation and clean up old code fragments DONE r24597

Originally requested in¶

• 1. #2625 Data aggregation functionalities for E+M (TransmissionEngine))*

in Ticket description:

When generating maps from the accumulated distribution information some special cases have to be handled: .... If there is an area with a sub area and both areas have the same calculated status only the subarea status should be shown in the map, whereas the super area should be ignored.

and secondly in a follow up ticket:

• 2. #3904 EuroMed: Implement filtering rules for Distributions**

[#3904#note-2]:

• Cz Former Czechoslovakia soll nur dann ausgegeben werden, wenn es für keines der Teilareale (Cs Czech Republic oder Sk Slovakia) eine Angabe gibt;
• Ju Former Jugoslavia soll nur dann ausgegeben werden, wenn es für keines der Teilareale (BH, Cg, Ct, Mk, Sl, Sr) eine Angabe gibt ;
• IJ Israel-Jordan soll nur dann ausgegeben werden, wenn es für keines der Teilareale (Ir, Jo) eine Angabe gibt;
• LS Lebanon-Syria soll nur dann ausgegeben werden, wenn es für keines der Teilareale (Le, Sy) eine Angabe gibt;

UPDATE: At least above requirement for Ju conflicts with the other rules, see [#4408#note-6]

Issues that exist with this rule¶

A couple of issues exist which are related to this rule:

• [#3907#note-26] the rule causes removal of named areas which should occur in the condensed distribution
  
• #4409 (filtering rules for Distributions: some named areas with sub areas are missing in distribution)
• #4408 (Distribution filter rule 2 not working in all cases)